Local img-cache files ignored for image transfers--NetApp CDOT driver

[Mike Rooney]

The cDOT NFS driver will only attempt to use the local img-cache-* files if the copy offload path is defined in the cinder.conf file. This should be attempted regardless of copy-offload's configuration.

In nfs_cmode.py copy_image_to_volume:

col_path = self.configuration.netapp_copyoffload_tool_path
if major == 1 and minor >= 20 and col_path:
    self._try_copyoffload(context, volume, image_service, image_id)

_try_copyoffload is where the img-cache is attempted to be used.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/223695

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/223695
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=acc7ddfb6d8edc7e6df7204089b25ba2e996ebef
Submitter: Jenkins
Branch: master

commit acc7ddfb6d8edc7e6df7204089b25ba2e996ebef
Author: Mike Rooney <email address hidden>
Date: Mon Aug 31 11:29:53 2015 -0400

    Local img-cache files ignored for image transfers

    The cDOT NFS driver will only attempt to use the local img-cache-*
    files if the copy offload path is defined in the cinder.conf file.
    This should be attempted regardless of copy-offload's configuration.

    Change-Id: I29e19da7c1e083e9c76cbcea1f397deefe30b016
    Closes-Bug: #1490641